Mindfulness as a general awareness of the present moment receives a lot of attention these days. This kind of awareness is sometimes labeled "bare attention" or "present moment awareness." Some, however, teach mindfulness as one aspect of a practice that aims to do more. In certain yoga traditions, for instance, the ultimate goal is to still the fluctuations of the mind. Paradoxically, the most effective way to still the mind often requires more than just sitting still, and finding out what methods work requires experimentation. This article explores one method that many people find useful to cultivate mindfulness: the simile of the gatekeeper.